Disable the email application from automatic login when you connect to Windows 8
Have you noticed that applications such as Messaging, Mail, People, Calendar, etc. automatically connect when you connect to Windows 8 with your Microsoft account? This is for your convenience, so you don’t need to connect to each application individually.
Disable the automatic connection of the email application under Windows 8
Many find it useful, but some do not want the email application to connect automatically. To disable the automatic signature of the email application, open it and press Win+I to open settings .
Click Option.
You will see an option to disable or enable all messaging services, i.e. send or receive messages. Move the cursor from On to Off.